<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>表格边框</title>
    <style>
        table {
            width: 500px;
            height: 300px;
        }
        th {
            height: 60px;
        }
        table,
        th,
        td {
            border: 1px solid grey;
            border-collapse: collapse;
        }
    </style>
</head>
<body>
    <table>
        <tr>
            <th></th>
            <th></th>
            <th></th>
            <th></th>
            <th></th>
        </tr>
        <tr>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>
        <tr>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>
        <tr>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>
        <tr>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>
        <tr>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
            <td></td>
        </tr>
    </table>
</body>
</html>